88 corvette poor exceleration
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Intermediate
Joined: Jul 2007
Posts: 34
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88 corvette poor exceleration
I have a 1988 vette that starts hard usually on the third primimg of the fuel pump stumbles than finally gets up to 1000 rpm, it also has midrange excelleration troble like it is running on 7 cylinders
new plugs wires plugs
distributor cap and rotor
convertor removed
comp test 121-125 on all 8
new temp sensor
is it time to look at fuel dilivery system
123k on stock vette
new plugs wires plugs
distributor cap and rotor
convertor removed
comp test 121-125 on all 8
new temp sensor
is it time to look at fuel dilivery system
123k on stock vette
Team Owner
Joined: Jan 2003
Posts: 20,293
Likes: 240
From: Summerland B.C. Canada
Buy or borrow a fuel pressure gauge, it helps to diagnose fuel delivery issues. http://members.shaw.ca/corvette86/Fu...mDiagnosis.pdf
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Drifting
Joined: Oct 2005
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From: North Carolina
Le Mans Master
Joined: May 2006
Posts: 9,226
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From: Irvine Ca
Buy or borrow a fuel pressure gauge, it helps to diagnose fuel delivery issues. http://members.shaw.ca/corvette86/Fu...mDiagnosis.pdf
Drifting
Joined: Oct 2006
Posts: 1,694
Likes: 0
From: Beaverton Oregon
I have a 1988 vette that starts hard usually on the third primimg of the fuel pump stumbles than finally gets up to 1000 rpm, it also has midrange excelleration troble like it is running on 7 cylinders
new plugs wires plugs
distributor cap and rotor
convertor removed
comp test 121-125 on all 8
new temp sensor
is it time to look at fuel dilivery system
123k on stock vette
new plugs wires plugs
distributor cap and rotor
convertor removed
comp test 121-125 on all 8
new temp sensor
is it time to look at fuel dilivery system
123k on stock vette
Drifting
Joined: May 1999
Posts: 1,478
Likes: 3
From: Sacramento, CA Money can't buy happiness - but it's more comfortable to cry in a Corvette than a Yugo.
Originally Posted by All2kool
It's PRIMING. Your car does not excellerate, it ACCELERATES.
I agree with All2kool in both respects. The problem is undoubtedly fuel/priming related and with the problems you describe, it most surely isn't excellerating.
If the fouling is due to a rich condition, I'd say that the #8 injector is leaking. This is probably the cause of the hard start condition and the mid-range acceleration problem. With 123k on the (most likely) original injectors, you really need all new or rebuilt injectors. Some year Vettes (89+) have multec injectors which were poor quality when new, and not worth rebuilding. The factory 88 injectors were Bosch or Lucas, and can easily be rebuilt by Rich at Cruzin Performance. You could also order replacements from several CF supporting vendors.
The 85-88 C4s have a special 9th injector that is used only for cold start conditions. There are no new replacements available form any OEM or after-market supplier. I would suggest that you have your original Cold-Start injector pulled and shipped to Rich for testing and reconditioning when you do the other 8 injectors. Replacing all of the injectors is a long one-weekend job that you can do yourself for a couple hundred dollars less than a shop would charge. Lots of labor, very little needed in tools or material.
